Awhile back, I set out to look at Fiber performance and how it’s improved in recent Ruby versions. After all, concurrency is one of the three pillars of Ruby 3x3! Also, there have been some major speedups in Ruby’s Fiber class by Samuel Williams.

It’s not hard to write a microbenchmark for something like Fiber.yield. But it’s harder, and more interesting, to write a benchmark that’s useful and representative.

source: L